US20100055622A1 - Method for making light blocking plate - Google Patents
Method for making light blocking plate Download PDFInfo
- Publication number
- US20100055622A1 US20100055622A1 US12/342,249 US34224908A US2010055622A1 US 20100055622 A1 US20100055622 A1 US 20100055622A1 US 34224908 A US34224908 A US 34224908A US 2010055622 A1 US2010055622 A1 US 2010055622A1
- Authority
- US
- United States
- Prior art keywords
- light blocking
- substrate
- film
- blocking plate
- photoresist layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/0005—Production of optical devices or components in so far as characterised by the lithographic processes or materials used therefor
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/005—Diaphragms
Definitions
- the present invention relates to a method for making the light blocking plate.
- lens modules have been widely used in various portable electronic devices.
- the lens modules of portable electronic devices have become smaller and smaller in size. Accordingly, it is required that optical elements (e.g., a light blocking plate) used in the lens module have a smaller size/volume.
- optical elements e.g., a light blocking plate
- a typical light blocking plate is made by processing a plastic/metal tape.
- the thickness of the light blocking plate is limited by the thickness of the plastic/metal tape.
- the thickness of the light blocking plate is generally larger than 30 ⁇ m. Such a light blocking plate may not meet the demand for the miniature of the lens module.
- FIG. 1 is a schematic, plan view of a light blocking plate made by a method according to an exemplary embodiment.
- FIG. 2 is a schematic, cross-sectional view of the light blocking plate of FIG. 1 taken along the line II thereof.
- FIGS. 3-10 are schematic views showing successive stages of a method for making the light blocking plate shown in FIG. 1 according to the exemplary embodiment.
- the light blocking plate 10 made by a method according to an exemplary embodiment, is shown.
- the light blocking plate 10 includes a though hole 101 defined at the center and an opaque portion 102 surrounding the through hole 101 .
- the light blocking plate 10 is comprised of a polydimethylsiloxane (PDMS) and a blackening agent. Because the PDMS is light pervious, a blackening agent is added to the PDMS to create the opaque effect to block light.
- the blackening agent can be a carbon black or a toluene.
- the light blocking plate 10 can be further comprised of a hardener.
- a method for making the light blocking plate 10 will be described in detail as follows.
- a substrate 30 with a surface 302 is provided, and then a photoresist layer 304 is formed on the surface 302 .
- the substrate 30 can be made of silicon.
- the potoresist layer 304 can be an epoxy-based negative photoresist (SU-8) layer.
- the photoresist layer 304 is exposed to an ultraviolet light through a gray scale photomask 40 with a predetermined pattern.
- the photoresist layer 304 is developed to form a plurality of conical frustums 306 .
- an exposed photoresist layer 3042 remains on the surface 302 of the substrate 30 .
- Each conical frustum 306 tapers in a direction away from the substrate 30 .
- Each conical frustum 306 extends in a direction substantially perpendicular to the surface 302 of the substrate 30 .
- a plurality of cones 310 instead of conical frustums 306 can be formed on the substrate 30 using the same process, as shown in FIG. 7 .
- an opaque to-be-solidified film 308 is formed on the exposed photoresist layer 308 , and then solidified.
- the to-be-solidified film 308 can be comprised of a PDMS, a blackening agent and a hardener.
- the thickness of the to-be-solidified film 308 should be less than the height of each conical frustum 306 so that each conical frustum 306 extends through the to-be-solidified film 308 .
- the to-be-solidified film 308 can be formed by spin coating. In spin coating process, the thickness of the to-be-solidified film 308 can be effectively controlled.
- each light blocking plate 10 includes a through hole 101 corresponding the respective conical frustum 306 .
- the light blocking plate module 100 is divided/cutting into a plurality of light blocking plates 10 , one of which is shown in FIGS. 1-2 .
- the thickness of the light blocking plate 10 is determined by the thickness of the film 308 .
- a light blocking plate 10 having a small thickness can be achieved.
- the thickness of the film 308 to be formed can be effectively controlled.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Elements Other Than Lenses (AREA)
- Exposure And Positioning Against Photoresist Photosensitive Materials (AREA)
Abstract
Description
- This application is related to the commonly-assigned copending application: Ser. No. _______, entitled “METHOD FOR MAKING LIGHT BLOCKING PLATE” (attorney docket number US22628). The Disclosure of the above-identified application is incorporated herein by reference.
- 1. Technical Field
- The present invention relates to a method for making the light blocking plate.
- 2. Description of Related Art
- Nowadays, lens modules have been widely used in various portable electronic devices. The lens modules of portable electronic devices have become smaller and smaller in size. Accordingly, it is required that optical elements (e.g., a light blocking plate) used in the lens module have a smaller size/volume.
- A typical light blocking plate is made by processing a plastic/metal tape. The thickness of the light blocking plate is limited by the thickness of the plastic/metal tape. The thickness of the light blocking plate is generally larger than 30 μm. Such a light blocking plate may not meet the demand for the miniature of the lens module.
- Therefore, a new method for making the light blocking plate is desired to overcome the above mentioned problems.
- Many aspects of the embodiments can be better understood with references to the following drawings. The components in the drawings are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the present embodiments. Moreover, in the drawings, like reference numerals designate corresponding parts throughout the several views.
-
FIG. 1 is a schematic, plan view of a light blocking plate made by a method according to an exemplary embodiment. -
FIG. 2 is a schematic, cross-sectional view of the light blocking plate ofFIG. 1 taken along the line II thereof. -
FIGS. 3-10 are schematic views showing successive stages of a method for making the light blocking plate shown inFIG. 1 according to the exemplary embodiment. - Embodiments will now be described in detail below with reference to the drawings.
- Referring to
FIGS. 1 and 2 , alight blocking plate 10 made by a method according to an exemplary embodiment, is shown. Thelight blocking plate 10 includes a thoughhole 101 defined at the center and anopaque portion 102 surrounding the throughhole 101. Thelight blocking plate 10 is comprised of a polydimethylsiloxane (PDMS) and a blackening agent. Because the PDMS is light pervious, a blackening agent is added to the PDMS to create the opaque effect to block light. The blackening agent can be a carbon black or a toluene. In addition, thelight blocking plate 10 can be further comprised of a hardener. - A method for making the
light blocking plate 10 will be described in detail as follows. - Referring to
FIG. 3 , asubstrate 30 with asurface 302 is provided, and then aphotoresist layer 304 is formed on thesurface 302. Thesubstrate 30 can be made of silicon. Thepotoresist layer 304 can be an epoxy-based negative photoresist (SU-8) layer. - Referring to
FIG. 4 , thephotoresist layer 304 is exposed to an ultraviolet light through agray scale photomask 40 with a predetermined pattern. - Referring to
FIGS. 5 and 6 , thephotoresist layer 304 is developed to form a plurality ofconical frustums 306. At the same time, an exposedphotoresist layer 3042 remains on thesurface 302 of thesubstrate 30. Eachconical frustum 306 tapers in a direction away from thesubstrate 30. Eachconical frustum 306 extends in a direction substantially perpendicular to thesurface 302 of thesubstrate 30. Alternatively, a plurality ofcones 310 instead ofconical frustums 306 can be formed on thesubstrate 30 using the same process, as shown inFIG. 7 . - Referring to
FIG. 8 , an opaque to-be-solidifiedfilm 308 is formed on the exposedphotoresist layer 308, and then solidified. The to-be-solidifiedfilm 308 can be comprised of a PDMS, a blackening agent and a hardener. The thickness of the to-be-solidified film 308 should be less than the height of eachconical frustum 306 so that eachconical frustum 306 extends through the to-be-solidified film 308. The to-be-solidifiedfilm 308 can be formed by spin coating. In spin coating process, the thickness of the to-be-solidifiedfilm 308 can be effectively controlled. - Sequentially, the
substrate 30 is turned over, and then thesolidified film 308 is separated from thesubstrate 30 and theconical frustums 306, thus obtaining a lightblocking plate module 100 including a plurality of light blocking plates 10 (seeFIGS. 9-10 ). Eachlight blocking plate 10 includes a throughhole 101 corresponding the respectiveconical frustum 306. - Lastly, the light
blocking plate module 100 is divided/cutting into a plurality oflight blocking plates 10, one of which is shown inFIGS. 1-2 . - In the above method, the thickness of the
light blocking plate 10 is determined by the thickness of thefilm 308. By controlling the thickness of thefilm 308, alight blocking plate 10 having a small thickness can be achieved. Particularly, in spin coating process, the thickness of thefilm 308 to be formed can be effectively controlled. - While certain embodiments have been described and exemplified above, various other embodiments from the foregoing disclosure will be apparent to those skilled in the art. The present invention is not limited to the particular embodiments described and exemplified but is capable of considerable variation and modification without departure from the scope of the appended claims.
Claims (8)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN200810304233.5 | 2008-08-27 | ||
CN200810304233 | 2008-08-27 | ||
CN200810304233A CN101661145A (en) | 2008-08-27 | 2008-08-27 | Distance piece array and manufacturing method thereof |
Publications (2)
Publication Number | Publication Date |
---|---|
US20100055622A1 true US20100055622A1 (en) | 2010-03-04 |
US8114577B2 US8114577B2 (en) | 2012-02-14 |
Family
ID=41725984
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/342,249 Expired - Fee Related US8114577B2 (en) | 2008-08-27 | 2008-12-23 | Method for making light blocking plate |
Country Status (2)
Country | Link |
---|---|
US (1) | US8114577B2 (en) |
CN (1) | CN101661145A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20170120251A (en) | 2016-04-20 | 2017-10-31 | 삼성전자주식회사 | Semiconductor Device and Method of Forming the Same |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6324010B1 (en) * | 1999-07-19 | 2001-11-27 | Eastman Kodak Company | Optical assembly and a method for manufacturing lens systems |
US20060251972A1 (en) * | 2005-01-04 | 2006-11-09 | Lee Tae-Woo | Flexible photomask for photolithography, method of manufacturing the same, and micropatterning method using the same |
US20090131887A1 (en) * | 2006-07-04 | 2009-05-21 | Toppan Printing Co., Ltd. | Method of manufacturing microneedle |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TW200736821A (en) | 2006-03-16 | 2007-10-01 | Hoya Corp | Pattern forming method and method of producing a gray tone mask |
-
2008
- 2008-08-27 CN CN200810304233A patent/CN101661145A/en active Pending
- 2008-12-23 US US12/342,249 patent/US8114577B2/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6324010B1 (en) * | 1999-07-19 | 2001-11-27 | Eastman Kodak Company | Optical assembly and a method for manufacturing lens systems |
US20060251972A1 (en) * | 2005-01-04 | 2006-11-09 | Lee Tae-Woo | Flexible photomask for photolithography, method of manufacturing the same, and micropatterning method using the same |
US20090131887A1 (en) * | 2006-07-04 | 2009-05-21 | Toppan Printing Co., Ltd. | Method of manufacturing microneedle |
Also Published As
Publication number | Publication date |
---|---|
US8114577B2 (en) | 2012-02-14 |
CN101661145A (en) | 2010-03-03 |
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Owner name: HON HAI PRECISION INDUSTRY CO., LTD.,TAIWAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:CHUANG, HSIN-HUNG;REEL/FRAME:022020/0910 Effective date: 20081210 Owner name: HON HAI PRECISION INDUSTRY CO., LTD., TAIWAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:CHUANG, HSIN-HUNG;REEL/FRAME:022020/0910 Effective date: 20081210 |
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